When bikepacking, all equipment is securely and weather-protected carried on a mountain bike or gravel bike. The Ortlieb Seat-Pack is an excellent choice for attaching luggage to the seat post. The experts in waterproof transport provide a robust and highly versatile saddle bag that is mounted to the seat post and saddle frame with strong Velcro fasteners. The reinforced bottom area ensures a stable hold of the Ortlieb Seat-Pack, even on challenging single trails. The Seat-Pack is loaded from the back via the typical roll closure, which keeps the luggage water- and dirt-tight. This allows for individual adjustment of the loading volume. Additional gear can be attached to the outside of the bike bag using the Daisy Chains and the elastic cord spider on the 16.5-liter version. The Ortlieb Seat-Pack is also suitable for carbon seat posts.